1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
//! PKCS#1 OtherPrimeInfo support.
use der::{asn1::UIntRef, DecodeValue, Encode, Header, Reader, Sequence};
/// PKCS#1 OtherPrimeInfo as defined in [RFC 8017 Appendix 1.2].
///
/// ASN.1 structure containing an additional prime in a multi-prime RSA key.
///
/// ```text
/// OtherPrimeInfo ::= SEQUENCE {
/// prime INTEGER, -- ri
/// exponent INTEGER, -- di
/// coefficient INTEGER -- ti
/// }
/// ```
///
/// [RFC 8017 Appendix 1.2]: https://datatracker.ietf.org/doc/html/rfc8017#appendix-A.1.2
#[derive(Clone)]
#[cfg_attr(docsrs, doc(cfg(feature = "alloc")))]
pub struct OtherPrimeInfo<'a> {
/// Prime factor `r_i` of `n`, where `i` >= 3.
pub prime: UIntRef<'a>,
/// Exponent: `d_i = d mod (r_i - 1)`.
pub exponent: UIntRef<'a>,
/// CRT coefficient: `t_i = (r_1 * r_2 * ... * r_(i-1))^(-1) mod r_i`.
pub coefficient: UIntRef<'a>,
}
impl<'a> DecodeValue<'a> for OtherPrimeInfo<'a> {
fn decode_value<R: Reader<'a>>(reader: &mut R, header: Header) -> der::Result<Self> {
reader.read_nested(header.length, |reader| {
Ok(Self {
prime: reader.decode()?,
exponent: reader.decode()?,
coefficient: reader.decode()?,
})
})
}
}
impl<'a> Sequence<'a> for OtherPrimeInfo<'a> {
fn fields<F, T>(&self, f: F) -> der::Result<T>
where
F: FnOnce(&[&dyn Encode]) -> der::Result<T>,
{
f(&[&self.prime, &self.exponent, &self.coefficient])
}
}
|
